[Gta04-owner] charging incident - overvoltage

Andreas Kemnade andreas at kemnade.info
Mon Apr 29 07:45:04 CEST 2019


Hi,

some weeks ago I connected my gta04 to some qualcom usb charger. While I was
checking for some loose connections / broken cables. I monitored vbus measured
by the gta04 intensively. Suddenly I hear a strange sound and voltage goes
up to around 6.5V. I immediately disconnect, so I do not have any logging
of that incident (I log only once per minute).
As far as I understand, these chargers can negotiate a higher voltage. So
something was mis-interpreted there.

Just to be warned. - well the German meaning of "Qual" fits here
(Qual = torture)

Has anyone more information on that?

Regards,
Andreas
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